python - 如何将 infile 中数据的平均值写入 out 文件

Question

这是我到目前为止的代码:

infileName="data.txt"
inFile=open(infileName,"r")
outfileName="avg.txt"
outFile=open(oufileName,"w")
for line in infile:
    test=line.split()
    first_name=test[0]
    last_name=test[1]
    first_initial=first_name[0]
grades=test[2:]

我不知道从这里该做什么。如何计算每行的平均值？

这是内文件data.txt:

betty smith 60 100 80 
john williams 50 100 
sue mason 20 30 40 60 50 

这应该是输出文件avg.txt的结果:

smith,b:80.0 
williams,j:75.0 
mason,s:50.0 – 

Answer 1

刚刚更正了您的代码以在输出文件中打印所需的结果:-

def add(a,b): 
    return a+b

infileName="data.txt"
inFile=open(infileName,"r")
outfileName="avg.txt"
outFile=open(outfileName,"w")
for line in inFile.readlines():
    test=line.split()
    first_name=test[0]
    last_name=test[1]
    first_initial=first_name[0]
    no_list = map(float, test[2:])
    avg = float(reduce(add, no_list))/len(no_list)
    outFile.write("%s %s %s\n"%(first_name, last_name, str(avg)))